190 METHODS AND FORMULAS F 0000.0010-F 0000.1000 



0000.0010 Potenza 1939 test. 1942 Langeron Langeron 1942, 419 



formula; methanol 50, dioxane 200, paraldehyde 5, acetic acid 12.5 



0000.0010 Sansom test. 1928 Gatenby and Cowdry 



formula: abs. ale. 165, chloroform 75, acetic acid 7.5 



0000.0010 Strauss 1909 23053a, 20 :3 



formula: 95% ale. 242.5, acetic acid 7.5 



000.0012 Acetic-trichloroacetic 



0000.0012 Davenport and Kline 1938 20540b, 13:160 



formula: n-butyl ale. 150, n-propyl ale. 50, acetic acid 25, trichloroacetic acid 25 



0000.0012 Hofker 1921 23632, 38:130 



formula: abs. ale. 200, acetic acid 25, trichloroacetic acid 25 



0000.0014 Acetic-nitric 

 0000.0014 Robin 1871 see P 12.2 Robin 1871 



0000.001 6 A cetic-hydrochloric 

 0000.0016 Jenkin 1920 see AF 21.1 Jenkin 1920 



0000.0023 Trichloroacetic-formic 



0000.0023 Davenport and KUne 1938 20540b, 13:160 



formula: n-butanol 150, n-propyl ale. 50, trichloroacetic acid 25, formic acid 12.5 



0000.0023 Davenport, McArthur and Bruesch 1939 20540b, 14 :22 



formula: n-butanol 160, n-propyl ale. 65, trichloroacetic acid 12.5, formic acid 12.5 



0000.1000 Formaldehyde Alone 



Formaldehyde in aqueous solution can scarcely be regarded as a fixative, though it is 

 widely used as a preservative fluid. All figures given for the alcoholic dilutions which follow 

 refer to cubic centimeters of the ordinary commercial so-called 40 % formaldehyde. This solu- 

 tion becomes acid on standing, but may be buffered to a desirable pH, usually about 8.5, by 

 the addition of borax. Another common procedure is to keep small chips of marble in the 

 stock bottle ; though this tends to cause a cloudy precipitate, if in no way interferes with its 

 fixative value. Burke 1933 (608b, 9:915) prefers pyridine (3 to 5%) as a neutralizing agent 

 but this cannot (Warbritton 1937, 20540b, 12 :125) be used in mercuric mixtures. Koenig, 

 Groat, and Windle 1945 (20540b, 20:13) recommend the addition of from 2.5% to 5.5% of 

 gum arable to counteract the gross cell shrinkage produced by diluted formaldehyde. 



0000.1000 Baker 1944 17510, 85:1 



formula: water 225, 40% formaldehyde 25, calcium chloride 1 



0000.1000 Benario 1894 7276, 20 :572 



formula: 90% ale. 250, 40% formaldehyde 2.5 



0000.1000 Boeke 1910 766,35:193 



formula: water 100, 95% ale. 125, 40% formaldehyde 10 



0000.1000 Bujor 1901 see AF 51.1 Bujor 1901 



0000.1000 Burke 1933 608b, 9 :915 



formula: water 187.5, 40% formaldehyde 67.5, pyridine 12.5 



0000.1000 de Castro 1916 21344, 14:83 



formula: water 250, 40% formaldehyde 37.5, urea nitrate 3.75 



0000.1000 Gulland 1900 23632, 17:222 



formula: 95% ale. 225, 40% formaldehyde 25 



